Compatible SDIO voltage translator for STM32F413

[Thai]

Hi,

We are designing STM32F413ZHJ6 at 1.8V and are looking for a suitable level translator to 3.3V for the on-board microSD connector. I'm considering NXS0506UP or NVT4858. Just wondering if these parts would be compatible with the STM32? Any suggestion?

Thanks,

Thai

[Tesla DeLorean]

Perhaps, but I don't recall the F4 having a direction pin, or a clock feedback path. Some of the H7 have this to facilitate a buffer, and lower voltages in Ultra / DDR modes, etc.

Suspect you'd need to prototype and test.

There are eMMC that will work at 1.8V as I recall

[Thai]

Hi Tesla,

Thanks. The STM32F4 only supports SDIO v2.00 so it will only be running in non-UHS modes. The translators I shared are auto-directional so direction pin should not be required.

I don't entirely understand the purpose of clock feedback (provided by most SDIO voltage translators) and when  would it be required. Could you share some thoughts? 

[Tesla DeLorean]

The feedback clock allows the peripheral to handle the delay / skewing of the signals across the shifter in the return path.

I'd want to see this work before building hundreds of boards.

Look at H7 rather than F4